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While his daughter Maryum, 46, who was also at the premiere, said her father would love the film and it will make him laugh and cry.

Her sister Hana, 38, is planning to show the legendary boxer the new movie at his Arizona home later this month.

Rahman Ali (third right) with brother Muhammad's daughters at the I Am Ali premiere on Wednesday

Directed by Clare Lewins, the documentary movie gives unprecedented access to Ali’s personal archive of ‘audio journals’ as well as interviews with his family and boxers Mike Tyson and George Foreman, and put together to tell his life story.

Nicknamed the Louisville Lip for his infamous wit, Ali remained active for several years after his diagnosis and made a moving appearance at the Atlanta 1996 Olympic Games where he lit the flame.

However, the sporting icon, who retired from boxing after suffering several strokes, was seen looking particularly thin and frail at the London 2012 Olympic opening ceremony where he was helped across the stage by wife Lonnie.

Ali looks on as referee Zack Clayton counts out George Foreman in their title bout in Zaire in Octobe 1974

Ali pictured at the Sports For Peace Fundraising Ball in London in 2012 (left) and in his heyday in 1974 (right)

In February 2013 his brother Rahman said Ali was so crippled by the degenerative brain condition that has afflicted many ex-boxers, he might not survive until the summer.

He also made claims that the family had been barred from seeing Ali, who is estimated to be worth more than £50million, and could only speak to him on the phone.

Rahman said his brother was ‘a prisoner in his own home’ and he is being gravely mistreated by his wife because ‘she is more interested in Ali's money than his well-being’.

Ali, who was diagnosed with Parkinson's in 1984, with wife Lonnie at an NFL game in New Orleans last year

The boxing legend poses with David Beckham during the Beyond Sport Summit in London in July 2012

Ali, pictured left at the London 2012 Olympic opening ceremony, where he was very frail and pictured right with Liberty director Shami Chakrabarti

However Ali’s daughter May May said she had spoken to her father that morning and he was fine, watching the Super Bowl at home in Arizona wearing a Baltimore Ravens jersey.

'He's fine, in fact he was talking well this morning,' she said in a telephone interview with CBS at the time. 'These rumors pop up every once in a while but there's nothing to them.'

Muhammad’s son, Ali Jnr, said in January he believe there was ‘no chance’ his father would survive another year.

‘I just want, hope and pray to God that this awful disease takes my dad sooner rather than later. Take him away from all the suffering he’s in.’